Chrysanthemum plant named &#39;Zanmustarbu&#39;

ABSTRACT

A  chrysanthemum  plant named ‘Zanmustarbu’ characterized by its large sized blooms with white ray florets and prolific branching; natural season flower date August 20 (week 34); blooming for a period of 5 weeks.

BOTANICAL DESIGNATION

Chrysanthemum×morifolium Ramat.

CULTIVAR DENOMINATION

‘Zanmustarbu’

BACKGROUND OF THE INVENTION

The present invention relates to a new and distinct cultivar of chrysanthemum plant, botanically known as Chrysanthemum×monrifolium Ramat., commercially grown as a garden mum, and herein after referred to by the cultivar denomination ‘Zanmustarbu’. ‘Zanmustarbu’ is a product of a breeding and selection program for outdoor pot mums (garden mums) which had the objective of creating new chrysanthemum cultivars with a double-spider type flower, a natural season flower date around August 20 (week 34); blooming for a period of 5 weeks. ‘Zanmustarbu’ is a seedling resulting from a crossing of the seed parent id 710 and pollen parent 16.590. Plants of the new cultivar ‘Zanmustarbu’ differ from plants of parent plants in (1) flower color (2) and bloom type. (1) The flowers of ‘Zanmustarbu’ are white, while those of the seed parent and pollen parent are yellow, and purple, respectively. (2) The flowers of the seed parent are double, while those of the pollen parent and of ‘Zanmustarbu’ are double-spiders.

The new and distinct cultivar was discovered and selected as a flowering plant by Wilhelmus Bemardus Blom on a cultivated field in Rijsenhout, The Netherlands in 2004. The first act of asexual production of ‘Zanmustarbu’ was accomplished when vegetative cuttings from the initial selection in 2004 were propagated further in a controlled environment in Rijsenhout, The Netherlands. The new cultivar has been found to retain its distinctive characteristics through successive propagations.

BRIEF DESCRIPTION OF THE DRAWINGS

The present invention of a new and distinct variety of chrysanthemum is shown in the accompanying drawings, the color being as nearly true as possible with color photographs of this type.

FIG. 1 shows a plant of the cultivar in full bloom.

FIG. 2 shows the various stages of bloom of the new cultivar.

FIG. 3 shows the various stages of foliage of the new cultivar.

DESCRIPTION OF THE INVENTION

The observations and measurements were gathered from plants grown out door in Rijsenhout, The Netherlands under natural day length and temperature and planted in week 25 in 2007. The natural blooming date of this crop was August 20 (week 34). The average height of the plants was 25 cm. No growth retardants were used. No tests were done on disease or insect resistance or susceptibility. No tests were done on cold or drought tolerance. This new variety produces large sized blooms with white ray florets blooming for a period of 5 weeks.

From the cultivars known to inventor the most similar existing cultivar in comparison to ‘Zanmustarbu’ is ‘Crete’ (U.S. Plant Pat. No. 16,677). When ‘Crete’ and ‘Zanmustarbu’ are being compared the following difference is noticed: The difference of ‘Crete’ and ‘Zanmustarbu’ are (1) Flower type And (2) Flower size. (1) The flowers of ‘Zanmustarbu’ are larger than those of ‘Crete’. (2) The flowers of ‘Zanmustarbu’ are double-spiders, while those of ‘Crete’ are purely double types.

The following is a description of the plant and characteristics that distinguish ‘Zanmustarbu’ as a new and distinct variety.

The color designations are taken from the plant itself. Accordingly, any discrepancies between the color designations and the colors depicted in the photographs are due to photographic tolerances. The color chart used in this description is: The Royal Horticultural Society Colour Chart, edition 2001.

TABLE 1 Botanical Description of chrysanthemum plant ‘Zanmuflamin’ Bud Size Small ;cross-section 1 cm, height 0.8 cm Outside Color Greyed-purple 186D Phyllaries 2 rows Phyllaries among disc- Not present florets Bloom Type Double Height 1.5 cm Size 4.5 cm Phyllary number 12-14 Phyllary color Green 138A Phyllary length and 2 cm and 2 mm width Peduncle length 4-4.5 cm Peduncle color Green 138B Number of blooms per Approx. 5 blooms per branch branch Performance on the 5 weeks plant Seeds Produced in small quantities, ovate grey-brown 199A, 1½ mm in length. Fragrance Typical chrysanthemum, slightly Color Center of the flower Immature stage: Red-purple 58A Mature stage: Red-purple 58A Color of upper surface Red-purple 59D of the ray-florets Color of the lower Greyed-purple 186C (at top) to 186D (at base) surface of the ray- florets Tonality from Distance A garden mum with bright purple flowers Color of the ray-florets Greyed-purple 186B after aging of the plant Ray florets Texture Upper and under side smooth Number 200-220 Cross-section Flat Longitudinal axis off Straight majority Length of corolla tube 0.3-0.4 cm Ray-floret margin Entire Ray-floret length 2-2.2 cm Ray-floret width 0.3-0.5 cm Ratio length/width High Shape of tip Rounded Disc florets Absent Receptacle sshape Conical raised Reproductive Organs Stamen Lacking Styles Short Style color Yellow 13A Style Length 3 mm Stigma color Yellow-green 144A Stigma Width 1 mm Ovaries Enclosed in clayx Plant Form Grown as a spray type potmum, outdoor mounded and round Growth habit Spherical shape Growth rate Medium vigour Height 30 cm Width 40 cm Stem Color Greyed-brown 199C Stem Strength Strong Stem Anthocyanin Present Coloration Internode length 1-2 cm Length of lateral From top to bottom 15-18 cm branch Lateral branch color Yellow-green 146C Lateral branch, Medium strength attachment Branching (average Good with 6-7 breaks after pinching number of lateral branches) Natural season September 11 (week 37) blooming date Foliage Leaf color Upper side Green 143b Lower side Green 143C Color midvein Upper side Yelloww-green 147D Lower side Yellow-green 148D Size Small.; length 4.5-6.5 cm, width 3-3.5 cm Quantity (number per 16 lateral branch) Shape Elliptic Texture upper side Glabrous Texture under size Pubescent Venation arrangement Palmate Shape of the margin Serrated Shape of Base of Sinus Acute Between Lateral Lobes Margin of Sinus Diverging Between Lateral Lobes Shape of Base Truncate Apex Mucronulate Petiole length 1 cm Petiole color Yellow-green 147D

TABLE 2 Differences with the comparison variety (grown under identical conditions) ‘Zanmuflamin’ ‘Venus purple’ Flower colour Red-purple 59D Red-purple 60A Natural season September 11 (week 37) September 18 (week 38) blooming date 

1. A new and distinct variety of chrysanthemum plant as described and illustrated. 